Process for the treatment of steels for industrial purposes.



aai

. phenomena are exhausted, the molecular rangements are complete the absence of tensionsis perfect and the Iaeility of machining' in a cold state is as great as possible havin@ regard to the nature of the metal, aim. owing to this the steeis are rendered capable of industrial utility.

What l claim and desire 'to secure by Letters Patent of the United Stat-es l. rlihe process oi treating steel for armor plates and otherpiirposes, cansisA .in maintaining-the temperature oi' said metal hei'ween ,the critical point in. l@ ing and 'the critical oeint i ini-e period 2. i` niece. armor pia eti ai bose-s.; coasting; in heating saiil n tal to a, temperature above the critical peint in heating. eenling the saine to a point above the Critical point iii eooline' ra? and then retarcling the Cooling of the saine by maintaining' for a period the temperature of the metal approximately at said lastnamed temperaine for the purposedescribed.

3. rlfhe process for treatment seels for armor plates anfl other purposes, consi in heatingA sairl metal to a ii'ieraiiiire above the critical' pe i heainifrt, eooiing the saine lo about the crilieai point", in eee-hug and ti n relai. ing of the. saine hy iieiiiiainlog?` i i'he tempera; the nir ai .-.ifiiuoiiinate. at Said. l 'irai ioin' i pose fiese e i. The pro for ireatn'ieni'; of armor ylaiesland other purposes, A.; in heating sani inria! lo a temperature above the critieai point in heating;- wohne; the saine to above the critical point in cooling, then retardingr the cooling of the same by maintaining for a period the temperature of the metal approximately at said Iasi-named iemperature and rehearing to a temperature short of that of the first heating. and. such that the transiornniiions first obtained are preserved.

The process ii'or treatment oi? steels for armor plates and. other purposes, consisting` in heating said. metal to a iemperatiire above ihe eriiieal point in heaiineooling the saine l to about `250" C. above the critieai point in cooling, then retarding the cooling or' the same by maintaining the 'temperature of the nietal approximately at said last-named temperature and reheating to a temperature short of that of the iirst heating, and such that 'the transformations iist'obaineol are preserved.

U. above the critical point in eoolii'ig and then retariiing eenling of the meta by furnishing thereto a supplelnencar quantity of heat.

8.' The process for 'the treatment of steels loi' armor plaies and other purposes, oonsisting' in heating said metal to a temperature above the critical point in heating, coeln" to a point above the critical point 1n i .e Cooling :infl then. retarcling eooiing of 'the :neral by furnishingthereo a supplementary nan'ily oi. heat. and rfa-heating to teine iiiire short of' that of the iirst heating snih that the transformations first ob- .l are gi serieel.

'"ihe pr s for he treatment o steels "'ar armor piates ani'i other [iiii'poses, con

.nggj n heatiing` said metal to a temperari :e above "the eri tical point in heating, coolto about 250 C. above the critical point in cooling' and then retarding cooling;s of the metal by furnishing thereto a supplementary quantity of heat and reheating to a temperatare short o1 that of the 'irst heating and siieh that the transformations first obtained are preserved.

In testimony whereof i have signed this specification in the presence of two subseribing iif'itnesses.

EUGNE SCHNRiDER..

iiiriiness s: man ni Soares f is l C. Corin. 

